Kiln, furnace, &amp;c.



PATENTED MAR. 24, 1903.

H INVENTOR H18 A TTORNEY J. ROBERTS. KILN, FURNAGE, &0. APPLICATION FILED NOV 12, 1896 w: Norms PETERS ca, PHOTO-LUNG WASHINGTON. n. c.

N0 MODEL U ITED "STATEs PATENT OFFICE.

JACOB ROBERTS, OF OATA S AUQUA, PENNSYLVANIA.

V KILN, FURNACE, a...

SPECIFICATION forming part of Letters Patent No. 723,310, dated March 24, 1903.

Application filed November 12, 1896. Serial No. 611,828. (No model.)

T to whom it may concern.-

Be it known that I,J'AooB ROBERTS, of Catasauqua, in the county of Lehigh and State of Pennsylvania, have invented. a certain new and useful Improvement in Kilns, Furnaces, &c. of which the following is a specification.

The present invention relates to improvements in kilns, furnaces, boilers, &c., and is especially designed for the purpose of cansing a more perfect combustion of the fuel used This object I 3 efiect by injecting a supply of oxygen upon the gases formed by. the heating of the fuel,

and this I preferably do by throwing a blast of cold air upon the combustible gases generated from the fuel at a point beyond the gen eration of saidgases.

It is well known to me that many devices have been employed for the purpose of throwing intoa furnace-space an additional supply of oxygen; but all these devices have proceeded on the theory that the best-results may" be obtained by passing hot air into the furnace-space, and for this purpose air has been led through heating-pipes or through hollow grate-bars and discharged upon the heated fuel and gases at difierentpoints beyond the point of consumption of the fuel. I have dis- I covered, however, that in these processes the j sage through the heating pipes without giving any beneficialresults.

oxygen is partially consumed during its pas- In my apparatus, on the other hand, cold air carrying its full proportion of oxygen is injected on the heated gases, which still hold unconsunied carbon,

at a point beyond the generation of such gases, and this injection ofcold air carrying oxygen upon the heated gases causes a combustion thereof. a

In the drawings I have illustrated the ap I plication of my invention to a brick-kiln.

Referring to the drawings,1 Figure 1 is a vertical section of a brick-kiln along the line 1 1 of Fig. 2. Fig. 2 is a horizontal section along the broken line 2 2 of Fig. 1.

Referring to the drawings in detail, 1 represents the wall of a brick-kiln, and 2 2 rep resent fire-boxes for the same, which fireboxes may be of any desired construction.

3designates a pipe surrounding the kiln and provided with branch pipes 4, projecting downwardly, and also branch pipes 5, project- ,the contents of the brick-kiln.

ing upwardly-from the pipe 3. Pipe 3 is in communication with a blower or fan and serves as a main feeder to branch pipes 4 and 5. The'branch pipes 4. are each provided with a mouth 6, which maybe trumpet-shaped or having one of its sides flaring, and which opens on the inside of the kiln at a point slightly above the fire-boxes. The pipes aialso lead down and supply air under pressure to a point below the grate-bars, as seen in Fig. 1. The pipes 5 extend to the top of the kiln and project their currents of air upon the top of The pipes 5 are also provided with mouths similar in form to the mouths on the pipes 4, and these rior of the kiln is caused, whereby the fullest efiect of the combination of the oxygen with the carbonaceous gases is produced.

In operating the device I first open the pipes 4, so that the current of air is applied to the fire-boxes at the bottom of the gratebars and also at a point just above the fireboxes on the interior until the contents of the kiln have become ignited to a considerable degree, whereupon as the gases now ascend, holding unconsumed carbon, I open the pipes 5, so as to inject an additional supply of oxygen upon the gases at the upper part of the kiln.

What is claimed as new is 1. A kiln having a series of air-conduits intermediate the top andbottom of the walls thereof, a series of similar conduits opening above the charged furnace-space, inclinedfurnace substantially as specified.

a 2. A circular kiln having a" series of fireboxes arranged at regular intervals aboutthe exterior of the kiln and provided with'flaring mouths opening into the furnace-space thereof, a series of air-conduits adapted to supply air under pressure and containing the normal quantity of oxygen, below the grate-bars of the fire-boxes and a series of similar conduits opening into the furnace above the fire-boxes and intermediate the top and bottom walls thereof, and also provided with flaring mouths opening upon the furnace-space, said mouths being so inclined as to project the currents of air issuing therefrom in the same direction to produce a spiral motion of the currents inside the furnace.

3. The combination with a circular kiln, of a plurality of fire-boxes arranged exterior to and having flaring mouths opening into the walls of the furnaces, and another series of similar conduits opening into the kiln above the charging-space thereof, said conduits adapted to supply air containing the normal quantity of oxygen to the fire-boxes and to the kiln, and formed with inclined flaring mouths opening upon the furnace-space, said mouths being so inclined as to project currents of air issuing therefrom in the same direction to produce a spiral motion of the currents inside the furnaces.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

. JACOB ROBERTS.

Witnesses: v

'JAs. M. HARTMAN, T. F. FREDERICK. 

